Hoisting-block



(No Model.) 2 sheetssheet 2,- J. T. HAMBAY.

HOISTING BLOCK.

Patented 'Jan. 21, 1890.

uy a N 723/ U ITED STATES PATENT OFFICE.

JAMES T. HAMBAY, OF'VVILKINSBURG, ASSIGNOR TO THE JACKSON MANU-FACTURING COMPANY, OF HARRISBURG, PENNSYLVANIA.

HOlSTlNG-BLOCK.

SPECIFICATION forming part of Letters Patent No. 419,852, dated January21, 1 890. Application filed July 5, 1889. Serial No. 316,593- (Nomodel.)

To all whom it may concern.-

Be it known that I, JAMES T. HAMBAY, a citizen of the United States,residing at VVilkinsburg, in the county of Allegheny and State ofPennsylvania, have invented or discovered certainnew and usefulImprovements in Hoisting-Blocks, of which improvements the following isa specification.

The invention described herein relates to certain improvements in thehoisting-tackle described and shown in Letters Patent No. 385,856,granted to me July 10, 1888; and it is the object of this invention toprovide for further variations in the lifting speed and capacity of thetackle, the speed being proportioned to the load to be raised, withoutany material variation of the speed of the driving mechanism.

In general terms, the invention consists in the construction andcombination of mechanical devices or elements, all as more fullyhereinafter described and claimed.

In the accompanying drawings, forming a part of this specification,Figure l is a sectional elevation of my improved apparatus, the plane ofsection being indicated by the line cc to, Fig. 4. Fig. 2 is asimilarview taken on the line y y, Fig. 1. Fig. 3 is a sectional view onthe line a 2, Fig. 1, the driving-wheel being shown in elevation. Fig. 4is a side elevation of the apparatus, and Fig. 5 is a detailed view ofthe device employed for changing the speed of the sprocket-wheel.

. In constructing my improved block the ends of the shaft 2 are mountedin bearings formed in the cheek or side plates 1, which are held inproper relation to each other by shouldered bolts 4, as shown in Figs. 2and 4. 011 this shaft 2 are keyed the sprocket-wheel 3 and gear-wheel 5,the sprocket and gear wheels being provided on their adjacent sides withhubs 6 and 7, which are constructed on their adjacent ends withalternating projections and recesses, so that the gear and sprocketwheels are locked together. These interlocking hubs serve as a centralsupport for the frame 8, the sides of said frame projecting outwardlyover the gear-wheel and resting at its edges upon aledge 9, formed onthe inner side of the frame 8, is arranged the powershaft 11, providedwith a screw or worm 12, arranged to engage the gear-wheel 5, said shaftbeing supported at one end by a bearing formed in the tubular portionand on the opposite side of the threaded portion by a bearing formed ina block 13, screwing into the tubular portion 10, as shown in Fig. 1.

On the power-shaft are mounted the pinion 14 and grooved driving-wheel15, the former being arranged in a recess formed in the driving-wheel,as shown in Fig. 1, both the pinion and driving-wheel being held inposition longitudinally of the shaft by a collar 16 keyed thereto. Thepinion and wheel are locked to the shaft as against independent rotationby a key 17, passing through a slot in the shaft and engaging groovesformed in the hubs of the pinion and driving-wheel. This key is made ofsuch a width that it may be shifted into engagement with either thepinion or driving-wheel, but not both at the same time. This movement ofthe key 17 is effected by a rod 18, arranged in a longitudinal openingin the shaft 11 and connected to the key at its inner end, its outer endbeing provided with a sleeve 19, surrounding the rod 18 and clasping thebar 20, which is provided with an arm 21. The free end of the arm 21 isprovided with a hook 22, which engages the edge of the collar 16, saidcollar serving as a fulcrum for the arm when moved back and forth by therotation of the rod 20, for the purpose of shifting the key 17, ashereinbefore stated. The pinion 14 intermcshes with an idler-pinion 23,loosely mounted on a stud 24, screwing into an internally-threadedsocket 25, formed on the frame 8, as shown in Fig. 1. This idler-pinion23 also engages with gear-teeth 26, formed on the outer wall of therecess in the driving-wheel 15, as shown in Figs. 1 and 4. The diametersof the pinions 14 and 23 and the toothed rim 26 are preferably soproportioned that one revolution of the wheel 26 will effect two or morerevolutions of the pinion 14 and of the shaft 11 as to maintain theblock in proper position, [0 substantially as set forth.

In testimony whereof I have hereunto set my hand.

JAMES T. HAMBAY.

Witn esses:

W. B. CORWIN, DARWIN S. WoLooTT.

(m MOM) M E HANOVER FASTENING DEVICE FOR PAUKAGES.

Patented Jan.21,1890.

